Answer:
C) 1/8 inch
Step-by-step explanation:
We are given the explicit formula
[tex]a_n=2(\frac{1}{4})^{n-1}[/tex], where n is the term number.
The third climb up would be the third term; this means we replace n with 3:
[tex]a_3=2(\frac{1}{4})^{3-1}\\\\a_3=2(\frac{1}{4})^2=2(\frac{1}{4}\times \frac{1}{4})=2(\frac{1}{16})=\frac{2}{16}=\frac{1}{8}[/tex]